Minolta Auto Meter F
This page is not to be confused with the Minolta Flash Meter series of meters.
The Minolta Auto Meter series was able to measure flash starting with a revision of the Auto Meter III.
Auto Meter III
Auto Meter III is a digital electronic exposure meter with a silicon photo cell. The previous Auto Meter line were Cds meters, with a calculator dial. This meter is powered by 4LR44 or equivalent batteries.
Auto Meter III F
The Auto Meter III F is a modified version of the regular Auto Meter III. The primary added feature was the ability to measure flash. The meter does not have a power button, the screen will automatically deactivate after two minutes of inactivity. Pressing the recall button awakens the screen, and your previous measurement will be displayed. The display will blink if the battery is too low. There is a measurement lock switch to prevent taking of measurements.
limitations and issues
- Display. The third and fourth digit of ASA and shutter speeds can only display zeros. eg shutter speed of 125 will display 120.
- Power consumption. Many people complain about a high rate of battery consumption. This is in fact caused by not having a power switch on the F model. The buttons on the face of the unit is raised enough to trigger the meter to power on from an inactive mode. Minolta did provide a keygaurd that did improve this somewhat. The best thing to do is remove the battery when not in use.
- Viewfinder 10°: for reflective light measurement with a 10°.
- 40° reflected light attachment
- Flat diffuser: to measure flat subjects, illuminance, brightness ratio of light sources.
- Mini Receptor: for close ups and macro photography
- Booster II: for measuring from camera eye pieces and ground glass. Also useful for reflected light measurement at 60°
- Spot Mask: for calculating exposures of enlargements in a darkroom.
- 4x and 8x spherical ND filter: used when light is too bright to measure.
Auto Meter IV F
|Minolta Auto Meter IV F|
image by Studioesper (Image rights)
The Auto Meter IV F was released in 1992. It has a newly designed body, with expanded metering sensitivity. The measuring head can be rotated 280 degrees. The traditional dome sphere can be removeable, and accessories like viewfinders can be installed. Measurements can be done in ambient, flash in a corded or non corded mode which takes a measurement after detecting a firing flash. The center bottom of the face has a pc sync cord connection. Measurements can be displayed on the LCD in EV mode as well as a traditional aperture and shutter speed. This is a shutter priority meter meaning you choose the desired shutter speed with buttons on the side of the body and when pressing the measure function; the proper aperture is calculated and displayed.
A cine mode is also available. To change to cine mode start in ambient mode and increase the shutter speed to above 1/8000 of a sec. Cine will be displayed on the LCD. By default it uses a 180 degree measurement angle. Using other angles require changing the ISO, for 160 degrees set the ISO down 1/3 of a stop by press the down arrow once; with 220 degrees set up 1/3 pressing up button.
This meter has a power button unlike the previous model solving many complains and battery usage problems. The battery consumption has also been reduced to a single inexpensive 1.5v AA/ LR6 battery. There is a calibration screw in the battery compartment to adjust the exposure reading levels. This is helpful when working with multiple meters and want to sync them for similar exposures. It can also be used if you like to frequently under or over expose your images.
Like the previous model there is a memory feature available to store a previous settings. This model can store up to the last three readings. To use this feature, take a measurement reading. You should see on the top LCD analog scale a marker. To store this reading press the M button. When you take an additional measurement from this point, the analog marker remains, but an additional marker appears and the main display changes to the new reading. To average a reading just press the A button after you store two markers. A third marker will appear between the original two.
Auto Meter V F
|Konica Minolta branded Auto Meter V F|
image by nik.jalopx (Image rights)
Auto Meter V F was released in 2002 and is nearly identical to the older Auto Meter IV F. This model was also re-released as the Konica Minolta Auto Meter V F when both companies merged and as the Kenko KFM-1100 after they exited the photo market.
The meter does have some changes compared the the older IV F. It has the ability to measure the proportions of flash and ambient light making it easier to modify different types of lighting. The ability to make many more changes in custom settings in alt mode, while the previous only had a screw exposure correcting setting in the battery compartment. Exposure correction value can be changed ±10 EV, shutter at full, half or a third. F no. can be changed to full or half stop display.
- Flat Diffuser
- 40° reflected light attachment
- Mini Receptor
- Viewfinder 5°
|Auto Meter III F||Auto Meter IV F||Auto Meter V F|
|Measuring system||incident and reflected|
|Measuring element||Silicon Photo Diode|
|Measuring range incident||-2.4 to 19.1 EV||-2 to 19.9 EV|
|Measuring range reflected||1 to 22.5 EV||1.2 to 23.1 EV|
|Measuring range viewfinder||?||vf 5°: 2.5 to 24.4 EV
vf 10°: 1.2 to 23.1 EV
|vf 5°: 2.5 to 24.4 EV|
|ASA||12 to 6400 ASA||3 to 8000 ASA|
|Shutter||30min to 1/2000||30min to 1/8000|
|Shutter flash||?||1s to 1/500|
|Aperture||digital: f0.7 to 64
analog: f1 to 45
|f1 to 90|
|EV||-5.4 to 28.5 EV||-7.8 to 31.5 EV||-17 to 40.8 EV|
|Cine||8 to 128 fps|
|Power||1× 6v alkaline 4LR44
1× 6v silver oxide 4SR44
1× 6v PX28
|1x 1.5v AA / LR6|
|Dimensions||132 × 69 × 31 mm||147 × 59 × 26 mm|
|Weight||150g wo batt||125g wo batt|